CVE-2026-28810 — Generation of Predictable Numbers or Identifiers in OTP

CWE-340 — Generation of Predictable Numbers or IdentifiersCWE-331 — Insufficient Entropy10 documents8 sources
Severity
6.3MEDIUMNVD
EPSS
0.1%
top 79.50%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Erlang OTP
Timeline
PublishedApr 7
Latest updateApr 13

Description

Generation of Predictable Numbers or Identifiers vulnerability in Erlang/OTP kernel (inet_res, inet_db modules) allows DNS Cache Poisoning. The built-in DNS resolver (inet_res) uses a sequential, process-global 16-bit transaction ID for UDP queries and does not implement source port randomization. Response validation relies almost entirely on this ID, making DNS cache poisoning practical for an attacker who can observe one query or predict the next ID. This conflicts with RFC 5452 recommendatio…

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Affected Packages1 packages

▶CVEListV5erlang/otp3.0 — *+2

🔴Vulnerability Details

3
VulDB
Erlang OTP up to 28.4.2 inet_res/inet_db generation of predictable numbers or identifiers (Nessus ID 305613 / WID-SEC-2026-0998)↗2026-04-13
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CVEList
Predictable DNS Transaction IDs Enable Cache Poisoning in Built-in Resolver↗2026-04-07
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OSV
CVE-2026-28810: Generation of Predictable Numbers or Identifiers vulnerability in Erlang/OTP kernel (inet_res, inet_db modules) allows DNS Cache Poisoning↗2026-04-07
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📋Vendor Advisories

2
Red Hat
erlang/otp: Erlang/OTP kernel: DNS cache poisoning via predictable DNS transaction IDs↗2026-04-07
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Debian
CVE-2026-28810: erlang - Generation of Predictable Numbers or Identifiers vulnerability in Erlang/OTP ker...↗2026
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🕵️Threat Intelligence

1
Wiz
CVE-2026-28810 Impact, Exploitability, and Mitigation Steps | Wiz↗
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💬Community

3
Bugzilla
CVE-2026-28810 erlang: Erlang/OTP kernel: DNS cache poisoning via predictable DNS transaction IDs [fedora-all]↗2026-04-07
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Bugzilla
CVE-2026-28810 erlang/otp: Erlang/OTP kernel: DNS cache poisoning via predictable DNS transaction IDs↗2026-04-07
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Bugzilla
CVE-2026-28810 erlang: Erlang/OTP kernel: DNS cache poisoning via predictable DNS transaction IDs [epel-all]↗2026-04-07
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CVE-2026-28810 — Erlang OTP vulnerability | cvebase